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ASSET IMPAIRMENTS AND RESTRUCTURING (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  | $ 72 | $ 39 | $ 1
Asset Impairments and Restructuring Charges Recognized [Abstract] |  |  |  |  |  |  |  |  |  |  |
Asset impairments |  |  |  |  |  |  |  |  | 27 | 0 | 1
Intangible asset and goodwill impairments |  |  |  |  |  |  |  |  | 45 | 39 | 0
Severance charges |  |  |  |  |  |  |  |  | 45 | 6 | 6
Site closure and restructuring charges |  |  |  |  |  |  |  |  | 9 | 0 | 1
Asset impairments and restructuring charges, net | $ 74 | $ 2 | $ 18 | $ 32 | $ 39 | $ 0 | $ 4 | $ 2 | 126 | 45 | 8
Restructuring Charge [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | 14 |  |  |  | 29 | 14 | 29 | 55
Restructuring Costs and Asset Impairment Charges |  |  |  |  |  |  |  |  | 126 | 45 | 8
Non-cash Reductions |  |  |  |  |  |  |  |  | (71) | (38) | 0
Cash Reductions |  |  |  |  |  |  |  |  | (41) | (22) | (34)
Balance at End of Period | 28 |  |  |  | 14 |  |  |  | 28 | 14 | 29
Non-Cash Charges [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Charge [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | 0 |  |  |  | 0 | 0 | 0 | 0
Restructuring Reserve, Period Increase (Decrease) |  |  |  |  |  |  |  |  | 72 | 39 | 1
Non-cash Reductions |  |  |  |  |  |  |  |  | (72) | (39) | (1)
Cash Reductions |  |  |  |  |  |  |  |  | 0 | 0 | 0
Balance at End of Period | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring Charges |  |  |  |  |  |  |  |  |  |  | 5
Asset Impairments and Restructuring Charges Recognized [Abstract] |  |  |  |  |  |  |  |  |  |  |
Asset impairments and restructuring charges, net |  |  |  |  |  |  |  |  |  | 6 |
Restructuring Charge [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | 6 |  |  |  | 19 | 6 | 19 | 42
Restructuring Reserve, Period Increase (Decrease) |  |  |  |  |  |  |  |  | 45 | 6 | 6
Restructuring Reserve, Accrual Adjustment |  |  |  |  |  |  |  |  | 0 | 1 | 0
Cash Reductions |  |  |  |  |  |  |  |  | (34) | (20) | (29)
Balance at End of Period | 17 |  |  |  | 6 |  |  |  | 17 | 6 | 19
Site Closure and Restructuring Costs [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Charge [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | $ 8 |  |  |  | $ 10 | 8 | 10 | 13
Restructuring Reserve, Period Increase (Decrease) |  |  |  |  |  |  |  |  | 9 | 0 | 1
Restructuring Reserve, Accrual Adjustment |  |  |  |  |  |  |  |  | 1 | 0 | 1
Cash Reductions |  |  |  |  |  |  |  |  | (7) | (2) | (5)
Balance at End of Period | $ 11 |  |  |  | $ 8 |  |  |  | 11 | 8 | 10
Additives And Functional Products [Member] | Property, Plant and Equipment [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  | 27 |  |
Additives And Functional Products [Member] | Goodwill [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  | 45 | 38 |
Advanced Materials [Member] | Indefinite-lived Intangible Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  |  | $ 1 |
Corporate Cost Actions 2019 [Member] | Corporate, Non-Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Asset Impairments and Restructuring Charges Recognized [Abstract] |  |  |  |  |  |  |  |  |  |  |
Severance charges |  |  |  |  |  |  |  |  | 45 |  |
Other Restructuring Costs |  |  |  |  |  |  |  |  | 5 |  |
Capital Project AFP [Member] | Additives And Functional Products [Member] |  |  |  |  |  |  |  |  |  |  |
Asset Impairments and Restructuring Charges Recognized [Abstract] |  |  |  |  |  |  |  |  |  |  |
Site closure and restructuring charges |  |  |  |  |  |  |  |  | $ 4 |  |
China Site Closure [Member] | Additives And Functional Products [Member] | Site Closure and Restructuring Costs [Member] |  |  |  |  |  |  |  |  |  |  |
Asset Impairments and Restructuring Charges Recognized [Abstract] |  |  |  |  |  |  |  |  |  |  |
Asset impairments and restructuring charges, net |  |  |  |  |  |  |  |  |  |  | $ 3

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